code: def test_get_name(self):
      self.assertEquals(
          BM25Difference(self.corpus)
          .set_categories("hamlet")
          .get_name(),
          "BM25 difference",
      )
  
file_path: scattertext/scattertext/test/test_BM25Difference.py
imports: from unittest import TestCase
  import pandas
  import numpy
  from scattertext.termscoring.BM25Difference import BM25Difference
  from scattertext.test.test_termDocMatrixFactory import build_hamlet_jz_corpus
label_desc: Use image node_id 3 for calling the TestBM25Difference obj's underlying member method code with example usage: obj.test_get_name() without return types